PERISTALTIC PUMP ASSEMBLIES, TUBING CASSETTES, AND SYSTEMS INCORPORATING SUCH PUMP ASSEMBLIES

• US 20110300010A1
• Filed: 07/15/2011
• Published: 12/08/2011
• Est. Priority Date: 08/12/2009
• Status: Active Grant

• Current Assignee: Boston Scientific Medical Device Limited (Boston Scientific Corporation)
• Original Assignee: Pathway Medical Technologies, Inc. (Bayer AG)
• Inventors: EUBANKS, Shannon, SCHUBERT, Keith, BRISTOL, Peter, VILBRANDT, Patrick, JARNAGIN, Scott Patrick, LAM, Gordon W.
• Granted Patent: US 9,072,540 B2
• Time in Patent Office: Days
• US Class Current: 417/477.2
• CPC Class Codes: A61B 17/3207 Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions A61B17/32037 takes precedence; endoscopic cutting instruments A61B17/320016
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 2017/00199 with a console, e.g. a control panel with a display
• CPC Class Codes: A61B 2017/00482 with a code
• CPC Class Codes: A61B 2017/22079 with suction of debris
• CPC Class Codes: A61M 1/72 Cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence
• CPC Class Codes: A61M 1/82 Membrane pumps, e.g. bulbs
• CPC Class Codes: A61M 2202/0014 removed from the body
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2209/084 Supporting bases, stands for equipment
• CPC Class Codes: A61M 25/0054 with regions for increasing flexibility
• CPC Class Codes: A61M 3/0201 Cassettes therefor
• CPC Class Codes: A61M 60/109 incorporated within extracorporeal blood circuits or systems
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/279 Peristaltic pumps, e.g. roller pumps
• CPC Class Codes: A61M 60/462 Electromagnetic force
• CPC Class Codes: A61M 60/857 Implantable blood tubes
• CPC Class Codes: F04B 43/0072 of tubular flexible members
• CPC Class Codes: F04B 43/1253 : by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing

Abstract

Peristaltic pump assemblies in which the closing and opening of a pivoting or sliding door is coordinated with movement of the occlusion bed toward and away from the rotor assembly to engage and disengage tubing within the occlusion pathway are disclosed. Linkage mechanisms provided by the interaction of cam surfaces with rollers, as well as bar linkage mechanisms, are disclosed. The linkage mechanism, in addition to providing precise displacement of the occlusion bed, may also provide an over-center feature that enhances safety and pump operation when the door is in a closed position. Latching mechanisms and sensors may be incorporated. Control consoles incorporating such peristaltic pump assemblies are described. Adaptive components such as tubing cassettes routing aspiration and/or infusion tubing in a predetermined configuration to mate with occlusion pathways in aspiration and/or infusion pump assemblies provided in various types of medical devices and control consoles are also provided.

Claims

1. A peristaltic pump assembly comprising a rotor assembly having a plurality of rollers mounted in a rotatable housing in operable communication with a drive motor for rotating the rotor assembly;

an occlusion bed slidably mounted in a spaced apart relationship to the rotor assembly and having a curved surface facing the rotor assembly that forms an occlusion surface for tubing retained in an occlusion pathway during operation of the peristaltic pump;

a pivoting or sliding door adjustable between an open condition providing access to the occlusion pathway and a closed condition in which access to the occlusion pathway is blocked;

wherein a linkage mechanism is provided that moves the occlusion bed in concert with the pivoting or sliding of the door.

2. The peristaltic pump assembly of claim 1, wherein the door is a pivoting door and the linkage mechanism comprises a pair of cam surfaces mounted on the door and a pair of rollers mounted directly, or indirectly to the occlusion bed and positioned to contact the cam surfaces as the pivoting door is closed and opened.

3. The peristaltic pump assembly of claim 2, wherein the cam surfaces are curved over a portion that contacts the rollers during closing and opening of the pivoting door and have a different curved profile or a flat profile that contacts the rollers at the far end of travel when the pivoting door is closed.

4. The peristaltic pump assembly of claim 1, wherein the linkage mechanism comprises a pair of bars pivotably mounted at one end to the door and at the other end, directly or indirectly, to the occlusion bed.

5. The peristaltic pump assembly of claim 1, wherein the linkage mechanism provides an over-center feature that facilitates positive positioning of the door in a closed position.

6. The peristaltic pump assembly of claim 1, wherein the linkage mechanism provides a linear actuation relationship between the position of the door and the position of the occlusion bed.

7. The peristaltic pump assembly of claim 1, wherein the linkage mechanism provides a non-linear actuation relationship between the position of the door and the position of the occlusion bed.

8. The peristaltic pump assembly of claim 7, wherein progressively less force is required to move the door as the door approaches the closed position.

9. The peristaltic pump assembly of claim 1, additionally comprising a mechanical latch that maintains the door in a closed position.

10. The peristaltic pump assembly of claim 1, additionally comprising a magnetic latch that maintains the door in a closed position.

11. The peristaltic pump assembly of claim 1, additionally comprising a latch that maintains the door in an open position.

12. The peristaltic pump assembly of claim 1, additionally comprising a sensor that senses when the door is in a closed position and allows pump motor operation when door is closed.

13. The peristaltic pump assembly of claim 1, additionally comprising a sensor that senses when the door is in an open position and disables pump operation when the door is open.

14. The peristaltic pump assembly of claim 1, wherein the occlusion surface comprises a material having a dynamic coefficient of friction in the range of 0.15-0.25.

15. The peristaltic pump assembly of claim 1, wherein the occlusion surface contacts a support surface having greater stiffness properties than those of the material forming the occlusion surface.

16. The peristaltic pump assembly of claim 1, wherein the relative position between the axis of rotation of the rotor assembly and the occlusion surface is adjustable.

17. The peristaltic pump assembly of claim 1, additionally comprising a sensor that senses the relative rotational position of the rotor assembly and stops the rotor assembly at one of a plurality of predetermined relative angular positions.

18. A control console incorporating at least one peristaltic pump assembly of claim 1.

19. A control console of claim 18 incorporating two peristaltic pump assemblies of claim 1, wherein one of the peristaltic pump assemblies comprises a high pressure peristaltic pump capable of infusing fluid at a pressure of up to 160 psi and another peristaltic pump assembly comprises a lower pressure peristaltic pump capable of aspirating liquid or liquid/solids mixtures at a pressure of up to (−

)15 psi.

20. An adaptive tubing cassette for use in connection with an interventional catheter assembly, comprising:

a handle component having an interface region adapted to mount stably in a mating interface region of a control console; and

at least one preformed tubing section mounted to and extending from the handle component, the at least one preformed tubing section adapted to mount stably in a tubing receiving pathway provided in connection with the control console.